MLSE based detection for GFSK signals with arbitrary modulation index

Author

Speth, Michael ; Madden, Michael ; Hammes, Markus ; Neubauer, Andrd

Author_Institution

Infineon Technol., Dusseldorf, Germany

fYear

2004

fDate

2004

Firstpage

228

Lastpage

231

Abstract

Due to its widespread use in cordless indoor systems like DECT, Bluetooth etc., Gaussian frequency-shift keying (GFSK) is an important modulation method. In this paper we present an approach to apply maximum likelihood sequence estimation (MLSE) to GFSK modulated signals. Using a linearized model of the modulation, we develop a pseudo-coherent detection scheme based on the estimation of the transmitter state. With this approach a joint detection and estimation scheme can be realized that allows the application of a Viterbi type equalizer to GFSK signals with arbitrary modulation indices. Simulation results show a gain of up to 7 dB with respect to conventional approaches.

Keywords

AWGN channels; Viterbi detection; channel estimation; frequency shift keying; indoor radio; maximum likelihood sequence estimation; radio receivers; radio transmitters; GFSK; Gaussian frequency-shift keying; MLSE; Viterbi type equalizer; arbitrary modulation index; cordless indoor system; joint estimation scheme; maximum likelihood sequence estimation; pseudo-coherent detection scheme; transmitter state; Bluetooth; Equalizers; Frequency shift keying; Maximum likelihood detection; Maximum likelihood estimation; Modulation; Signal detection; State estimation; Transmitters; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 International Zurich Seminar on

Print_ISBN

0-7803-8329-X

Type

conf

DOI

10.1109/IZS.2004.1287431

Filename

1287431